Trouble Shoo Ng - NANO NXC Series User Manual

R
cycling refrigerated air dryer
2. 1 3 trouble shooting
problem cause
Compressed air temperature too
high
Compressed air fl ow rate too high
Compressed air pressure too low
Ambient temperature too high
A. Dew point
too high
Dirty fi ns of the condenser
Condensing unit face clogged
The fan runs backwards
(three-phase)
Refrigerant gas leak
The HP pressure switch has tripped.
Compressed air fl ow rate too high
B. Excessive drop
Condensate frozen
in compressed
air pressure
Exchanger Tubes soiled by
impuri es in the compressed air.
The condensates have frozen and
block the passage as the
probe is incorrectly posi oned.
The condensate have frozen and
C. Compressed air
block the passage as the set
does not fl ow
point is programmed too low.
through the dryer.
The condensate have frozen and
block the passage as the
electronic controller has failed.
1
l
symptom
The digital display panel indicates
a value > 50°F permanently.
Same as above
Same as above
Same as above
Same as above
Same as above
Same as above
The compressor runs all the me.
The compressor top is very hot.
The digital display panel is OFF.
Pressure downstream from the
dryer lower than the expected
value.
Pressure downstream from the
dryer lower than the expected
value.
Pressure downstream from the
dryer lower than the expected
value.
Compressed air does not fl ow
through the dryer.
A er the star ng the
compressor, value 0 is reached
in less than 2 minutes.
The compressor stops.
The compressor does not stop
even if the Carel indicates 0
several minutes.
solu on
Return the air inlet temperature to
within the limits.
Correct the air fl ow rate to within the
limits of the dryer.
Correct the pressure to within the
limits.
Correct the temperature to within
the limits. (R134a unit, limit is 122°F,
R407c unit, limit is 110°F)
Clean the condensing unit fi ns.
Clean the condensing unit face.
Correct electrical connec on (phase
inversion)
Find the leak and repair it.
See note E.
Reduce the compressed air fl ow rate.
See note C.
Wash the heat exchanger tubes with
a non-aggressive detergent solu on.
Check the fi lter upstream from the
dryer.
Posi on the probe in the center of the
DTM heat exchanger.
Increase the set point value.
See note H.
Change the Carel.
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